2 Samuel 1:14-17

14So David asked him, “Why were you not afraid to lift your hand to destroy the LORD’s anointed?” 15Then David summoned one of the young men and said, “Go, execute him!” So the young man struck him down, and he died. 16For David had said to the Amalekite, “Your blood be on your own head because your own mouth has testified against you, saying, ‘I killed the LORD’s anointed.’”

17Then David took up this lament for Saul and his son Jonathan,